Apparatus for reclaiming of used lubricating oils



'u Feb. G, 1945. l G. BOTTARQ ECLAIMING OF USED lLUBRIC'IINC'*OILS APPARATUS Fon R 2 Shegts-Sheet 1 l Filed Feb. 25. 1938 Feb; 6, 1945.' G, B01-TAR() ,l l 2,368,636

APPARATUS FOR RECLAIMING OF USEDA LUBRICATING" OILS Filed Feb. 2:5. 1938 2 Sheets-Sheet 2y @fg-f@ g5( 55k; zf; 6;,

u? u 45a? Patented Feb. 6, '1945 UNITED STATE! APPARATUS FOR RECLAI'MING OF USED f LUBRICATIN G OILS. Y

Giacomo Bottaro, Genoa, Italy; Vvested in the AlienPropex-ty Custodian Application February z3, 193s, Vstrati No. 192,177

y Y In muy Much 1, 1937 ZCiaims.

forms on the surfaces adheres soclosely to them that it cannot be removed by mechanical means. In this way an actual compound is formed between the asphal and the surfaces of the porous walls which forms a diaphragxnwhich functions as a skin, so that the oil is rst absorbed by said diaphragmy and then passes through the porous walls.- All impurities suchas colloidal coal, dust and other quantities of asphalt are caught by the asphalty-porous-surface-diaphragm which adsorbs also substances which are dissolved colloidally in the oil.

In the annexed drawings, one embodimentof the invention is illustrated only by way of example.

In the drawings: Y

' Fig. 1 isa vertical section on the line I-I of Fig. 2.

Fig. 2 is a horizontal section on the line 2-'2 of Fig. 1.

Fig. 3 is a vertical section on the line 3-3 of Fig. 1.

Fig. 4 is an enlarged fragmentary detail of one of the filtering elements, portions beingbroken away. o

Fig. 5 is an enlarged vertical transverse section of one of the elements.

Fig. 6 is an enlarged plan view of the Scrapers.

As illustrated in the drawings, the device has a tank I insulated by a layer 2 of suitable material, a removable cover 3 with'a depressed receptacle 4 with a perforated bottom 5. In the bottom of the tank I, there is a discharge pipe 6 with a cock 6a. The tank i contains a plurality of removable filtering elements F, three being shown for` illustration in the drawings (Figs. 2 and 3). Each element F has a rectangular; equilateral frame 1, on each of the two opposite i'lat faces of which are suitably superposed a perforated plate 8, a metal net S and a layer of porous material I (Figs, 4 and 5). Wires II are suitably mounted onA the outer surfaces of the material I Il.-

It will be noted (Figs. l and 4) that these wires I I are inclined from the perpendicular. Each element F is provided in its bottom with a discharge pipe I2 having a peripheral shoulder I3 and a frusto-conical end portion I4 (Fig. 5). Sockets I adapted to receive therein the portions I4 are formed in a beam I6 bridging the lower part-of tank I. Eachv socket I5 has depending therefrom av discharge pipe `l1 Awhich passes throughA a packed'joint in the wall of tank I and is'provided exteriorlyofthe tank` I with a cockV I8, so thatV each element F is provided with a draw-oil means. Each element F has a grip G at its upper edge (Fig. 1) Vfor placing the element in tanki and removing it therefrom.` Retainer strapsi I9. are suitably mounted by hinges 20 onone inner wall of the tank I and fastened by latches'2l pivoted on ears 22 on the opposite inner `wall Vof tank I. Binding screws 23 are threaded through the straps I9 to adjustably securethe elements Fin proper positions in the tank I.. .Each element F has an air vent 24 passing through a hole 25 in the cover 3 of tank I. The tank I.has a, suitable heating element H controlled by a thermostat E, and also has a thermometer T'. suitably journaled `inthe upper part of the tank I are the shafts 26 and 21, and, inthe lower part, the shafts 28 and 29 (Fig. 1). On the corresponding ends of shafts V2li and 21 arel mounted sprockets 30, respectively, connected by a horizontal sprocket chain 3|, and on corresponding ends of shafts 28 and 29 are mounted sprockets 32 connected by a horizontal Asprocket chain 33. Shaft 26vhasan extension ZG-a (Fig. 3) passed through a packed joint 26-b in theewall of tank I, and having a squared end 26-c for the application of a crank (not shown) for rotating shaft 26. Shaft 2liV has a sprocket 34 mounted on one end adjacent sprocket 30, and, on its opposite end, a sprocket V35. K sprockets v36 and 31 corresponding and aligned with sprockets 34 and 35 respectively. Sprockets 34 and 36 ,areV connected by a vertical sprocket chain 38, and sprockets 35.and 31 by a'vertic'al sprocket chain 39'(Fig. 3). In the same way, shaft 21 has sprockets 40 and,4i (Fig, 2), and

shaft 29 has corresponding sprockets (not shown).

are so disposed and related that a vertically mov-V able sprocket chain (38, 39,43, 43)' is provided at each corner of the tank I '(Flgg2) and that rota-- tion of shaft`26 by the crank will rotateshafts Y 21; 28 and 29, and cause thes'procket chains 38,V

39 and 43 to travel.

A horizontal rod 44 is attached by means of 'ears 45 on its ends to sprocket chains 38 and 39,

and a horizontal rod 46 by means of ears" to sprocket chains 43, It will be noted (Figs: 2 and Shaft 28, below shaft 26, hasVV Vchain 38, and run 39-a kof chain 39, and that rod 46 is attached to runs 43-a of chains 43, so that the vertical movements of the rods 44 and Y 46 will correspond.YV The above described mount-V ing of rods 44 and 46 disposes them transversely and on opposite ends ofthe members F (Figs. 2

and 3). slidabiy vmounted on rods u and a6 are bars 48 V'and 49, arranged in pairs so that a bar of each pair is adjacent one side of each ele.

ment F (Fig. 2). Each bar is provided on its face adjacent element Frwith a scraperv 58 designed and disposed to bear against the wires II on the outer faces of the elements FiFg. 1). ACoil springs are provided on the rods 44V and 48, j

interposed'between ears 45, 41v and rodsl 48 and 49 (Fig. 6) urging bars 48;and 49'together, to cause the Scrapers 50 to press 'against the wires Il. A wedge 52 is slidably received betweenthe ends of the bars 48 and 49 of each pair (Fig. 3). Ihese wedges`52 are so designed and disposed that when they are depressed the bars 48 and 49 approach one another under ,the inuenceV of springs 5I, and when they are elevated the bars 48and 49 Vareseparated against Vthe Vinfluence of springs 5I. Abutments 53, mounted in VtheV lower part of the tank I, and abutments 54'in the upper part are located ln the path of travel of the wedges 52, andare adapted to elevate and depress the wedges 52,'respectively. y

From the Vforegoing description of the details of Vconstruction of 'thedevica its useV and opera; tion'will appear. The Vused oil isfed into the receptacle V4,V the coarserl impuritiesbeing retained on its bottom 5 rand the oil with its finer impurities -owing downwardlyf'into the'tankA I. The elements F, havin-g'be'enpositioned in tank I before the oil is introduced, are then surrounded by the voil which comes into contact with the porous material I I) forming the outer surface of ,each siderof each ofthe elements F. The oil, passing through the porous material VII) is ltered vented. l

wedges 52 are depressed relatively to the bars 48 and'49, causing them to approach one an'-Y other, as indicated Vin dotted lines in the upper portion of Fig. 5, under the iniluence of springs 5I so that the Scrapers 5I)Y are pressed tightly against the wires I I on the surfaces of the porous.

'facerof the material I0 beyond the wires, I I. This excess falls to the' bottom ofthe tank I and can be removed therefrom through pipe B. Thus it is obvious that byfuse of the Scrapers 50 the,A

layers Yon the material IIJV can be maintained at the vdesired thickness determined by the diameter of the wires II, and that by reason of the inclination of wires II from the perpendicular, the edges of the scrapers 50 do not become serrated Vby wear from'thevwires II, and thereby any variation of the thickness of the layer is pre- It is obvious that moved from tank .I by releasing straps I9 lifting the element F by grip G. Y

VWhatis claimed is: Y

= l'. A device for separating impurities from used lubricating oil ycomprising a container, at least one plate-like filtering element disposed vertically within said container, each illteringelement comeach A,element rF can be re'- and I prising two spaced perforated plates, a metal net thereby and enters the elements F purified, Yand Y can'be discharged'therefrom through the pipes I1. Thev impurities' separated from Vthe oil, re# tained on the material I0, accumulate to form a deposited layer'through which-the oil must pass to enter the elements F. When this layer has been built up to such anextent that it exceeds the proper thickness, the excess portion of the layer can be removed Iby the Scrapers 5I! andvr their operating mechanism'. Y, Y

` When the bars 48 and`49, on which-the Scrapers 50 are provided, are moveddownwardly by useV ormeV transen-'the end `2sc of shaft 2s, until the 'bottoms of the wedges 52 bear against the abutments 53, the bars 48 and 49 continuing to move downwardly, the wedges 52 are elevatedY relatively to bars 48 and 49, causing them to sep! arate as indicated in the .lower portion of Fig. 5,

Y and thereby moving thefscr'apers llaway from disposed outside of each plate, a layer of porous Vmaterial outside of 'eachvnet means Vcormriun'icating with the space between the perforated; plates for removing clean oil, means foradmitting used oil Yinto the containerto surround each of the filtering elements, scraper v,means for removing excess impurities from the 'outer' surface of the ilvteringl element, means for reciprocating said scraper means over said surface,.means forrad' justing said scraper means alternatelyginto and out of operative position in relation'to saidsur-Y face, and means fora .ctuating said adjusting means, said actuating means operating lwhen the scraper means reaches the end of each'stroke of reciprocation. Y. Y 4

2; A device for separating impurities from used lubricating oil comprising a container, at least one plate-like filtering element disposed vertically within said container, each ltering element com- Iprising two spaced perforated plates, a metal net disposed outside of each plate, a layer of porous the wires' II on the material I0 of each face of each of the Aelements F. The bars 48 and 49 then move' upwardly, the Scrapers 50 passing the faces of the sidesv of elements Iii-spaced therefrom and completely out of contact Vwith the layers of im.` purities deposited thereon, until Vthe tops of wedges 52 'bear' against the abutments 54, the -bars 48 and 49Ycontinuin'gto move upwardly, the

, and downward movement.

material outside Vofieach net, means communieating `with thespace between the perforated plates for removingclean oil, means for admitting used oil into the container to surround each of the filtering elements, scrapermeans for removing excess impurities from the outer surface of the filtering elementfmeans for moving 'said ,scraper means upwardly and downwardly over said surface, means Vfor adjusting said scraper means into operative position when moving downwardly and into inoperative position when moving upwardly, and means for actuating saidadjusting means, said actuating means operatingwhen the scraper means reaches, the, limits of its upward GIACOMO VBOT'llrARO.. 

